Gravity -- Does gravity depends on atmosphere?

[Bandersnatch]

He commented on the strength of Earth's gravity varying at different places. This is not really a density issue but a distance from the center issue. Otherwise, the strength of gravity would be weaker if you were in a boat then on land at sea level.

You mean something like these?
http://en.wikipedia.org/wiki/Gravity_anomaly
http://en.wikipedia.org/wiki/Mass_concentration_(astronomy)

 

[JLowe]

You mean something like these?
http://en.wikipedia.org/wiki/Gravity_anomaly
http://en.wikipedia.org/wiki/Mass_concentration_(astronomy)

Interesting read, I had never thought about it like that but I suppose it should have been obvious.